METHOD AND ARRANGEMENT FOR OPTICAL INSPECTION OF A WELD SEAM

摘要

In the welding together of sheet-metal blanks (6,7) an image of a line pattern projected across the weld seam is captured by a camera (31) and evaluated to inspect the weld seam. For improved inspection, a sidewards view of the weld seam (26) is obtained, eg. by means of a prism (30), in addition to the view from above. This affords an improved and more accurate inspection of the weld seam.